3750 code

[glen.grant]

    What is the  most stable of the more current codes that don't have too many known problems for a 3750G-12S?  Right now it is ipservices 12.2.25SEE1. I know some of the newer ones have some issues so I'm looking for stability.

[Bilal Nawaz · Accepted solution]

Hello Glen, I think its unanimously agreed amongst users on CSC that 12.2(55) SE7 is one of the most stable releases for 3750's. Always been advised by Leo and Inayath, and I also encourage this IOS version.

I know in my experience I had a significant change in downgrading to 12.2(55) SE7 (upgrading in your case) - I know in my scenario its a 3750X, but nevertheless, you will see other posts with the suggestion of this version that fixed a lot of peoples problems.

Please see here: https://supportforums.cisco.com/message/3962833#3962833
https://supportforums.cisco.com/message/3965307#3965307
https://supportforums.cisco.com/message/3898165#3898165
https://supportforums.cisco.com/message/3932681#3932681
https://supportforums.cisco.com/message/3963707#3963707
https://supportforums.cisco.com/message/3941258#3941258
https://supportforums.cisco.com/message/3865880#3865880
https://supportforums.cisco.com/message/3921005#3921005
https://supportforums.cisco.com/message/3920963#3920963

and on and on....

Hope this helps.

Please rate useful posts & remember to mark any solved questions as answered. Thank you.

[Reza Sharifi · Accepted solution]

From what I have seen here on the forum 122.55(SE7) seems to be the one that is recommended.

Reza

[glen.grant]

  Great , thanks guys for the answer .  I'll check into that .

[Leo Laohoo]

Here's the dig, Glen ...

1.  12.2(55)SE7, by far, is THE most stable IOS around.

2.  15.0(2)SE2 is a close contender, HOWEVER, if you are running 802.1X, stay away from this version and go to option #1.

[Leo Laohoo · Accepted solution]

Right now it is ipservices 12.2.25SEE1.

Another thing, Glen.

This is an old IOS and the IOS you're upgrading means that the bootstrap will be automatically upgraded.  Do not be alarmed when you see the appliance boot up TWICE.  This is just a once-off. 

[glen.grant]

  Thanks for the heads up Leo  .  It is old .We are troubleshooting an issue where traffic seems to occasionaly drop a packet or 2 here and there as it travels thru the switch and we see no other reason for this to be happening.

[Leo Laohoo]

You should be right then, Glen.

[Leo Laohoo]

Stay as far away as you can from version 15.0(2)SE3.

Sent from Cisco Technical Support Nintendo App

[glen.grant]

  I didn't even see a 15.X version for this original 3750  so it will be  the 12.2.55SE7 . 

[Reza Sharifi]

Correct, the latest you can load on this switch is 12.2.55SE7.

IOS 15 can be used for E and X series.

Reza

[Leo Laohoo]

IOS 15 can be used for E and X series.

You can load 15.0 into the 3750G as well.

Glen,

I should have been more specific:  Avoid 15.0(2)SE3 in ALL switches (and not just 3750/G/E/X).

[Reza Sharifi]

Leo,

You can load 15.0 into the 3750G as well.

You can? I looked for it on CCO, and the only one I saw for Glen's model was 12.2 range.

Maybe, I don't have enough privilages on my profile to see 15.

Reza

[Leo Laohoo]

Some 3750G models (like the PoE versions) comes with 32 mb flash.  So it'll fit. 

Reza,

PM sent.

[InayathUlla Sharieff]

Reza,

You are right :-)

Regards

Inayath